GB1025753A - Improvements in or relating to hydraulic or pneumatic actuators - Google Patents

Improvements in or relating to hydraulic or pneumatic actuators

Info

Publication number
GB1025753A
GB1025753A GB408962A GB408962A GB1025753A GB 1025753 A GB1025753 A GB 1025753A GB 408962 A GB408962 A GB 408962A GB 408962 A GB408962 A GB 408962A GB 1025753 A GB1025753 A GB 1025753A
Authority
GB
United Kingdom
Prior art keywords
conduit
ram
valve
cylinder
main ram
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB408962A
Inventor
Thomas Alfred Oldfield
Roderick Rudd Carr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB408962A priority Critical patent/GB1025753A/en
Priority to DE19631425830 priority patent/DE1425830A1/en
Publication of GB1025753A publication Critical patent/GB1025753A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/261—Locking mechanisms using positive interengagement, e.g. balls and grooves, for locking in the end positions

Abstract

1,025,753. Fluid pressure apparatus. PLESSEY CO. Ltd. Jan. 25, 1963 [Feb. 2, 1962], No. 4089/62. Heading FIP. An hydraulic or pneumatic actuator system comprises a subsidiary ram 10 connected to operate via a crank member 8 a plunger 7 for locking a main ram 2 in its extended position when pressure fluid controlled by a first valve 34, 35, 36 opened by the main ram 2 on attaining its extended position is supplied through a conduit 38 to the subsidising ram. In the unlocked position a selector valve 12 is in its left position whereby pressure fluid supplied through a conduit 19 to the valve 12 passes to the subsidiary ram cylinder 11 through a conduit 22 to maintain the subsidiary ram therein extended. In addition the pressure fluid passes through a conduit 24 and a valve 25, 26, 27 to the main ram cylinder 3 to maintain the main ram 2 retracted. The non-pressurized side of the cylinder 3 is vented to atmosphere through a conduit 31 and a port 33. To extend the main ram 2 the selector valve 12 is moved to the right whereby the subsidiary ram cylinder 11 is vented to atmosphere through the conduit 22 and an exhaust duct 29 in the valve 12 and simultaneously the main ram cylinder 3 is also vented through a port 28A leading to the duct 29. The main ram 2 therefore moves to its extended position under the action of pressure fluid supplied through the conduit 19 to the conduit 31, and on attaining its fully extended position pressure fluid is allowed to pass from a branch conduit 37 and the valve 34, 35, 36 to the cylinder 11 to thereby move the plunger 7 to its locking position. A vent 40 in the rod 9 of the subsidiary ram is arranged to maintain the main ram cylinder 3 connected to atmosphere through the port 28A when the subsidiary ram is retracted. When it is required to return the main ram to its retracted position the selector valve 12 is moved so that pressure fluid is re-supplied to the conduit 22 whereby the subsidiary ram moves to the extended position, retracting the plunger 7 and opening the valve 25, 26, 27 to supply fluid to the main cylinder through the port 28A. The cylinders and the valve 12 may be formed as a single body provided with ducts corresponding to the conduits described. A conduit B as shown in broken lines may replace the branch conduit 37.
GB408962A 1962-02-02 1962-02-02 Improvements in or relating to hydraulic or pneumatic actuators Expired GB1025753A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB408962A GB1025753A (en) 1962-02-02 1962-02-02 Improvements in or relating to hydraulic or pneumatic actuators
DE19631425830 DE1425830A1 (en) 1962-02-02 1963-02-01 Actuation or drive system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB408962A GB1025753A (en) 1962-02-02 1962-02-02 Improvements in or relating to hydraulic or pneumatic actuators

Publications (1)

Publication Number Publication Date
GB1025753A true GB1025753A (en) 1966-04-14

Family

ID=9770533

Family Applications (1)

Application Number Title Priority Date Filing Date
GB408962A Expired GB1025753A (en) 1962-02-02 1962-02-02 Improvements in or relating to hydraulic or pneumatic actuators

Country Status (2)

Country Link
DE (1) DE1425830A1 (en)
GB (1) GB1025753A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184488B (en) * 1985-12-16 1989-10-18 Denzal Wayne Van Winkle Self actuating locking and unlocking arrangement and method for reciprocating piston type actuators

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4121073C2 (en) * 1991-06-26 2003-12-18 Ise Gmbh Pneumatic drive for a safety device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2184488B (en) * 1985-12-16 1989-10-18 Denzal Wayne Van Winkle Self actuating locking and unlocking arrangement and method for reciprocating piston type actuators

Also Published As

Publication number Publication date
DE1425830A1 (en) 1969-06-26

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